What you just mentioned is merely a problem of strategy. However, what I meant is this;
Blue player 1 captures red flag 1 and goes to red base 2, which has a red flag at it. He goes onto red base 2. This causes Blue player 1 to keep his flag, but for red to score a point instead of blue. The same, obviously, applies if a red player with a blue flag goes onto a blue base with flag.